About Voice dialing
Voice dialing refers to a calling feature for your phone service that allows you to say the name of the person you want to call rather than dial their number. You can also record 100 voice contacts through your phone and store 1000 contacts in the Web application.
This can be achieved in two ways. The first is to to record the commands in before time and then use them. This also means that only the user who has recorded the commands may use them.
The second enables phones use text recognition and there is no pre-recording is required. When a user issues a command these phone or device usually match it to the nearest contact in the phone book.